the fifth cave of trials is extremely annoying to beat it just put in all the spells possible and use the centaurs, succubi (fiery demons), witches, dwarves, goblins, and suicide bomber things. then only defend your base until you have 91 units, then launch the spell pheonix strike. when your units keep dying keep send in more. note make sure you are still using the spells also make sure all your units are fifth rank. if it does not work the first time keep trying it might work (eventually).
 "Epic War 3"){kind=icon}